The next in the battle over obama care. After a rough day on capitol hill for hhs secretary, kathleen sebelius. She called the launch a debacle, apologized and took full responsibility. But the grilling never let up. And abc's jim avila has the latest from washington. Reporter: The president at the birthplace of romney care, defending obama care. And telling the boston crowd, it will get better. I'm not happy about it. There's no excuse for it. And I take full responsibility for making sure it gets fixed asap. Reporter: While back on capitol hill, before a much more hostile audience at a congressional hearing, the woman responsible for the affordable care act, fell on her sword. Let me say directly to these americans. You deserve better. I apologize. Hold me accountable. I'm responsible. Reporter: Secretary kathleen sebelius was reluctant to pass the buck, even when pressed. I think it's great you're a team player and taking responsibility. It is the president's ultimate responsibility, correct? You clearly -- whatever. Yes, he is the president. He is responsible. Reporter: But apologies did little to stop the 3 1/2-hour onslaught of republican criticism wednesday, after a memo surfaced showing the lead contractor, working on the site, warned of numerous problems. Do you believe that two weeks was enough time to complete testing of the entire system? Clearly not. house administration official tells abc news, that they understand that they gave the republicans this opportunity. But they believe, they're very confident, in fact, that once the website is fixed, that the american public will embrace obama care. George? And they know they have to meet that november deadline. Jim, thanks very much.

This transcript has been automatically generated and may not be 100% accurate.

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